Dynamoelectrical machine with wedged-in winding bars

Abstract

A dynamoelectrical machine ( 20 ) has winding bars ( 13 ) which are inserted into slots provided for this purpose in the dynamoelectrical machine ( 20 ), with the slots each being closed by cover wedges ( 23 ), and with corrugated springs ( 16 ) being provided between the cover wedges ( 23 ) and the winding bars ( 13 ) located underneath them, which are prestressed by means of opposing wedges ( 21 ), which are arranged between the cover wedges ( 23 ) and the winding bars ( 13 ) located underneath them. In a machine such as this, fast and simple wedging is made possible in that the opposing wedges ( 21 ) are arranged between the cover wedges ( 23 ) and the corrugated springs ( 16 ), and in that fixed-position adjusting elements ( 22 ) are provided, by means of which it is possible to vary the distance between the cover wedges ( 23 ) and the opposing wedges ( 21 ).

What is claimed is: 
     
       1. A rotating dynamoelectrical machine comprising:
 an axis of rotation 
 slots extending along said axis of rotation and being provided for receiving winding bars of a winding of said dynamoelectrical machine; 
 winding bars inserted into said winding bar receiving slots; 
 cover wedges, said winding bar receiving slots each slideably receiving and being closed by one of said cover wedges; 
 corrugated springs arranged between said cover wedges and said winding bars; 
 opposing wedges, said corrugated springs being prestressed by said opposing wedges, said opposing wedges being arranged between said cover wedges and said winding bars; 
 wherein said opposing wedges are arranged between said cover wedges and said corrugated springs; and 
 adjusting elements being distributed along said winding bar receiving slots at predetermined and fixed positions, said adjusting elements being configured and arranged to vary the distance between said cover wedges and said opposing wedges. 
 
     
     
       2. The dynamoelectrical machine as claimed in  claim 1 , wherein the adjusting elements are configured and arranged to:
 rotate about a fixed-position rotation axis; and 
 vary the distance between the cover wedges and the opposing wedges by rotation of the adjusting elements about the fixed-position rotation axis. 
 
     
     
       3. The dynamoelectrical machine as claimed in  claim 2 , wherein the adjusting elements are rotatably mounted in the cover wedges, and the adjusting elements are supported on the opposing wedges by a surface facing away from the cover wedges. 
     
     
       4. The dynamoelectrical machine as claimed in  claim 3 , wherein the adjusting elements each have a bolt part and each cover wedge includes a hole, each adjusting element bolt part rotatably mounted in a cover wedge hole. 
     
     
       5. The dynamoelectrical machine as claimed in  claim 4 , wherein the adjusting element bolt part includes an external thread, and the cover wedge hole includes a threaded hole matched to said external thread. 
     
     
       6. The dynamoelectrical machine as claimed in  claim 4 , wherein the adjusting elements each have a disk part located between the cover wedge and the opposing wedge and coaxial with the bolt part;
 wherein the disk part includes an upper face and a lower face, the cover wedge includes a lower face, and the opposing wedge includes an upper face; and 
 wherein the upper face and lower face of the disk part, the lower face of the cover wedge, and the upper face of the opposing wedge are configured and arranged in the area of the disk part such that the distance between the cover wedge and the opposing wedge varies when the disk part is rotated. 
 
     
     
       7. The dynamoelectrical machine as claimed in  claim 6 , wherein opposite faces of the disk part and of the two wedges comprise cutouts which match one another and projections projecting out of a face, the cutouts and projections configured and arranged to engage one another and disengage from one another depending on the rotation position of the disk part. 
     
     
       8. The dynamoelectrical machine as claimed in  claim 4 , wherein the hole in the cover wedge comprises a through-hole, and further comprising:
 a recess into which a tool for operation of the adjusting element can be inserted, said recess formed on an upper face of the bolt part. 
 
     
     
       9. The dynamoelectrical machine as claimed in  claim 1 , further comprising:
 at least two adjusting elements for each cover wedge. 
 
     
     
       10. The dynamoelectrical machine as claimed in  claim 1 , wherein the adjusting elements comprise a non-magnetic material.